| back into the reservoir | 8 | transitive-object |
| to locate | 5 | purpose |
| into the formation for later recovery | 5 | purpose |
| gas → be → injected | 81 |
| gas → be injected into → the system | 3 |
| negative | neutral | positive |
| 0.171 | 0.782 | 0.047 |
| Raw frequency | 84 |
| Normalized frequency | 0.598 |
| Modifier score | 0.160 |
| Perplexity | 486.268 |